WO2003051784A1 - Holder for tip and method for manufacturing the same, and scribing device and manual cutter that are provided with the holder for tip - Google Patents

Abstract

A holder for a tip, which holder is provided with a cutter tip having conical shafts at both sides of it. Recessed portions, on the side of the holder for a tip, for supporting rotatably the cutter tip have a bell-shaped form having a curved face with a predetermined curvature radius. Further, the holder for a tip is structured such that a solid lubricant can be supplied from the outside of the holder for a tip. This structure has been able to prolong the work lifetime of the cutter tip of the holder for a tip.

Description

 Specification

Chip holder, method of manufacturing the same, and chip holder

 Scribe device and manual force cutter

 The present invention relates to a tip holder having a cutter tip, a method of manufacturing the same, and a scribing device and a manual cutter having the tip holder. Background art

 In the chip holder for cutting brittle material, a cutter chip is attached to the lower end of the chip holder to cut the brittle material, and a scribe line is formed on the surface of the brittle material. FIG. 1 shows an example of a conventional cutter tip, which is disclosed in Japanese Utility Model Publication No. 62-0237779. As shown in FIG. 1 (a), the cutter tip 2 has a shape in which the bottom surfaces of two cones are bonded to each other, and the two sharp tips (apexes) are attached to the cutter tip 2 as shown in FIG. It was used as the axis for In addition, as shown in FIGS. 1 (b), (c) and (d), the power cutter chip 2 has a shaft in which the slope of the power cutter chip 2 has a concave shape, and a cutter chip which has a generally inclined slope. And there are cutter tips with R chamfers on both ends. The material of the force cutter chip 2 is sintered diamond. In the cutter tip having such a configuration, the frictional resistance between the shaft support portion and the tip holder is low, and the scribe life is extended.

In recent years, however, the demand for lowering the final product price has been spurred on, for example, liquid crystal display panels obtained by scribing, and further reductions in scribing costs and improvements in scribing processing efficiency have been further demanded. Have been. As for the chip holder, it was necessary to develop a holder with a longer life that could be applied to scribe processing. Disclosure of the invention

 An object of the present invention is to provide a tip holder having a longer scribe life and further improving processing efficiency.

 A tip holder according to the present invention is provided with a cutter tip having a conical shaft formed on both sides of a cutting edge ridge, two holder members, and a cutter tip provided on each of opposing sides of the holder member. It consists of a bearing to support. Here, the shape of the recess of the bearing that supports the cutter tip is a bell shape. For example, the bell shape is a curved surface having a predetermined radius of curvature.

 In the above-described chip holder, for example, the recess is not penetrated through the holder member.

 In the tip holder, for example, the HQ portion is not penetrated through the holder member, and the radius of curvature of the bell shape is 0.1 Dram, assuming that the diameter of the edge of the cutter tip is Dmm. Dram.

 In the above-described chip holder, for example, the recess penetrates the holder member.

 In the tip holder, for example, the recess penetrates one member of the holder, and the radius of curvature of the bell shape is Dmn! ~ 2 Dmm.

 In the above-mentioned chip holder, for example, the material of the bearing is a single crystal diamond.

 In the above-mentioned chip holder, for example, the material of the bearing is sintered diamond.

In the method for manufacturing a tip holder according to the present invention, comprising a cutter tip having a conical shaft formed on both sides of a cutting edge, a bell-shaped recess is formed in a bearing that supports the power cutter tip, The bearing holding member holding the bearing is attached to a first holder member and a second holder member, and then the first holder member and the second holder member each having a cutter tip and a bearing are combined. In the above manufacturing method, for example, the material of the bearing is single crystal diamond. Here, preferably, the bell-shaped concave portion is processed by using a YAG laser. In the above-mentioned manufacturing method, for example, the material of the bearing is a sintered diamond. Here, preferably, the bell-shaped recess is released! ¾3.

 Further, the scribing device according to the present invention provides the above-described chip holder according to the present invention, wherein the scribing head moves in the X direction and / or the Y direction relative to the table on which the brittle material substrate is placed. Is provided.

 The manual cutter according to the present invention includes a cylindrical handle and the above-described tip holder according to the present invention mounted on one end of the handle.

 According to the present invention, since the concave portion on the tip holder side that holds the cutter chip having a shape in which the bottom surfaces of the two cones are bonded to each other is a curved surface having a predetermined radius of curvature, the rotational accuracy of the cutter tip is improved. As the solid lubricant is supplied, the frictional resistance with the shaft support decreases, and the life of the cutter tip and the tip holder can be extended. BRIEF DESCRIPTION OF THE FIGURES

 FIG. 1 is a diagram showing an example of a conventional cutter tip provided in a tip holder.

 FIG. 2 is an enlarged view showing details of a bearing portion of a conventional chip holder.

 FIG. 3 is a diagram showing a die part in a wire drawing machine.

 FIG. 4 is a front view and a side view of the chip holder.

 FIG. 5 is an enlarged view of a bearing portion of the chip holder according to the first embodiment of the present invention. FIG. 6 is an enlarged view of a bearing portion of the chip holder according to the second embodiment of the present invention. FIG. 7 is an enlarged view of a bearing portion of the chip holder according to the third embodiment of the present invention. FIG. 8 is a view showing a production example of a bearing for a chip holder according to a third embodiment of the present invention.

 FIG. 9 is a front view of a scribing apparatus equipped with the chip holder of the present invention. FIG. 10 is a side view of the scribe device of FIG.

FIG. 11 is a partial cross-sectional view of a manual cutter equipped with the tip holder of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

 Hereinafter, embodiments of the invention will be described with reference to the accompanying drawings. In the drawings, the same reference symbols indicate the same or similar components.

 The present inventor has studied a conventional chip holder in order to increase the processing efficiency and further extend the scribe life. FIG. 2 shows details of a conventional cutter tip 2 attached to the lower end of the tip holder 1 and a bearing 3a of the holder 1. Bearings 3a support both sides of the cutter tip. The bearing 3 a is made of sintered diamond, and a conical recess is formed in the shaft support 3 b in contact with the cutter tip 2 so as to follow the shape of the cutter tip 2. In order to extend the scribe life of the cutting edge by conducting the life test of the cutting edge, the frictional resistance between the cutter tip 2 and the shaft support 3b is reduced, rather than preventing the cutting edge of the cutter tip 2 from being worn out. It was found that increasing the rotational accuracy of 2 was more effective. In other words, in order to extend the life of the cutting edge, it is desirable to increase the rotational accuracy of the cutter tip and to reduce the amount of wear on the shaft of the cutter tip and the bearing of the tip holder.

 Meanwhile, FIG. 3 shows a die portion in a wire drawing machine for continuously drawing the diameter of the wire S. The die part consists of a part called bell (entrance), broach, reduction, bearing, back relief and exit from the entrance side. This die is formed of diamond from the viewpoint of life and machining accuracy. The inner surface machining area of the die is finished in an appropriate shape to obtain machining accuracy, wear resistance and sufficient strength, and the cross-sectional shape is gently curved.

 The present inventor has adopted a curved bell-shaped shaft support as in the bell portion of the die shown in FIG. 3 instead of the conical recessed shaft support shown in FIG. It has been found that the scribe life of the cutting edge can be prolonged by improving the centripetal force of the cutter tip and further increasing the rotational accuracy by the line contact.

FIG. 4 shows a front view (A) and a side view (B) of the chip holder 1 for cutting brittle material. At the lower part of the chip holder, two holder members 1a and 1b are provided in parallel, and the chip 2 is rotatably supported by a bearing (not shown). In FIG. 4, the holder members la and 1b are integrated with the chip holder 1. It is assembled by inserting the cutter tip 2 into the lower end. The tip holder is manufactured so that the axes of the bearings of the holder members 1a and 1b are aligned with each other.The tip holder is tightened at a predetermined distance to hold the cutter tip 2 rotatably. It can be used as desired.

 FIG. 5 shows a cross section of the lower end of the chip holder 20 according to the first embodiment of the present invention. As shown in FIG. 5, the bearing holding member 6 is provided, for example, in circular grooves provided on the lower surfaces of the first holder member 20 a and the second holder member 20 b on mutually opposing surfaces. It is attached to the mouth. The bearing holding member 6 is, for example, a sintered metal of Fe-Cu-Sn, and is formed by sintering into a predetermined cylindrical shape together with a bearing 5a obtained by processing a diamond, for example, a single crystal diamond. . The cutter tip 2 has a conical shaft formed on both sides of the cutting edge. The shaft support 5b on the surface of the bearing 5a has a curved bell shape as shown in the bell portion of FIG. For example, when the cutting edge 2 of the cutter tip 2 has a diameter of 2 ridges, the radius of curvature of the curve is approximately in the range of 0.2 to 2. Also, assuming that the diameter of the cutting edge is Dmm, the radius of curvature of the curve is selected from a range of about 0.1 D to D mm.

 The shaft support 5b forms a non-penetrating recess. That is, the concave portion of the shaft support 5b is not penetrated with respect to the bearing 5a. In this case, the solid lubricant is supplied from the force cutter 2 side of the shaft support 5b. Tungsten disulfide and molybdenum disulfide are examples of solid lubricants, and these have a wide range of operating temperatures and are resistant to evaporation.

 FIG. 6 shows a lower end portion of the chip holder 20 according to the second embodiment of the present invention. Similarly to the lower end portion of the chip holder 1 of the first embodiment, the lower portions of the first holder member 20a and the second holder member 20b are formed in circular grooves respectively provided on mutually facing surfaces. The bearing holding member 6 and the bearing 7a are provided. The shaft support portion 7b has a through hole 7d, and the through hole 7d is closed by the bearing holding member 6.

FIG. 7 shows the lower end of the chip holder 20 according to the third embodiment of the present invention. Similarly to the lower end portion of the chip holder 1 of the second embodiment, circular grooves provided on the lower surfaces of the first holder member 20a and the second holder member 20b, respectively, are provided on the surfaces facing each other. The bearing holding member 6 and the bearing 7a are provided. Here, the shaft support 7 b is a bearing 7 It has a through hole 7d penetrating through a, and a through hole 7c is also formed on the bearing holding member 6 and the holder 11 side so as to match the through hole 7d. These through-holes 7c and 7d are used as inlets for solid lubricant supplied from outside the holder 20.

 Further, in this case, for example, when the diameter of the ridgeline of the cutting edge of the force cutter tip 2 is 3, the radius of curvature of the curve of the shaft support 7b is about 36. Also, if the above-mentioned edge ridge diameter is Dmm, the radius of curvature of the curve is approximately Dmn! ~ 2 D Select from the range of length.

 In the chip holder of the present invention, the two holder members 1 a and lb in FIG. 4 are replaced with the first holder member 20 a and the second holder member 20 b of the above-described first to third embodiments. It is a thing.

FIG. 8 shows an embodiment of a manufacturing process for manufacturing the bearing 7a from single crystal diamond or sintered diamond. When the bearing 7a is manufactured from the single crystal diamond X, the single crystal diamond X is cut at the upper and lower parts (the shaded part in (a) in Fig. 8) by processing with a skiff machine, etc. Drilling is performed at the center, and a bell-shaped hole is formed as the basis of the shaft support 7b ((b) in Fig. 8). ((C) in Fig. 8) After that, loose particles (diamond grains 2 to 4 _μΓη ) are supplied to the shaft _support 7 and the needle-like member 1 having the same tip angle as the shaft _{support 1} is supplied. 2 is rotated, and the head is further swung to perform a lapping process so as not to break the bell shape ((f) in FIG. 8).

In the case of producing a sintered diamond bearing 7a, diamond particles are first hardened on a cylindrical bearing member 7a 'having a predetermined external dimension (FIG. 8 (d)). Next, using the discharge electrode 11 formed in a bell shape in advance, discharge machining is performed on the bearing member 7a ', and the bell shape is transferred to the bearing member 7a' ((e in FIG. 8). )). After that, loose abrasive grains (diamond abrasive grains 2 to 4 / zm) are supplied to the surface subjected to the electric discharge machining, and the needle-shaped member 12 having the same tip angle as the shaft support is rotated, and further, the head is swung to make a bell shape. The rubbing process is performed so as not to break (Fig. 8 (f)). Precious stones such as sapphire and ruby may be used for the bearing 7a. Further, the finishing lapping is not limited to the above method, and for example, wire wrapping may be used.

 In the manufacture of the chip holder of the present invention, the bearings 5 a and 7 a having the predetermined bell-shaped recess as described above are held by the bearing holding member 6 to form the first holder member 20 a. It is attached to the second holder member 20b. Next, the first holder member 20a including the cutter chip 2 and the bearings 5a and 7a is combined with the second holder member 20b.

 When a scribing test is performed on the insert holder with a cutting edge load of 1.0 kg, the conventional type shown in Fig. 2 has an average running life distance of 150,000 m, which is the result of the durability evaluation test. In the case of the present invention, the average scrub life was significantly extended, with an average of 300,000 m. In addition, the injection of solid lubricant every 10,000 m further increased the tool life by about 20% to 30%.

 Oil bearing impregnated sintered alloys, so-called oilless bearings, are used for bearings 5a, 7b of bearings 5a, 7a that support cutter tip 2, so that regular replenishment of solid lubricant is not required. It is possible to maintain stable scribe performance. The life of the bearings 5a, 7a can also be extended by subjecting the shaft supports 5b, 7b to a coating treatment for surface modification and hardening (for example, defric coating). Becomes possible.

Next, a scribing device equipped with the above-described chip holder will be described. 9 and 10 are a front view and a side view of one embodiment of the scribe device. In this scribing device, the brittle material substrate 50 placed on the horizontal rotary table 51 is fixed to the horizontal rotary tape holder 51 by vacuum suction means. A pair of parallel guide rails 52 supports the table 51 so as to be movable in the Y direction (a direction perpendicular to the paper surface in FIG. 9), and the ball screw 53 supports the table 51 along the guide rail 52. Move. The guide bar 54 is installed above the table 51 along the X direction (the left-right direction in this figure). The scribe head 55 is provided on the guide bar 54 so as to be slidable in the X direction, and the motor 56 slides the scribe head 55. The tip holder 20 described above rises below the scribe head 55. ^B: ::: mounted for later possible and swing, at its lower end, the cutter tip 2 is mounted rotatably. A pair of CCD cameras 58 is installed above the guide bar 54 to recognize the alignment mark displayed on the brittle material substrate 50 on the table 51. In addition, every time the formation of one scribe line is completed, the scribe head 55 has a holder 180 for turning the cutter tip 2 by 180 ° as described above. ° There is built-in means for reversing the force tip.

 The manual cutter shown in FIG. 11 is also equipped with the above-mentioned holder for small chips. The cylindrical handle (handle) 61 serving as a grip portion of the manual cutter is the same as the glass cutter disclosed in Japanese Utility Model Publication No. Sho 62-23780 by the present applicant. The chip holder 20 according to the present invention described above is mounted. The manual power tool is applied not only to glass but also to brittle materials such as ceramics and semiconductor materials. Here, in order to supply oil to the cutter tip 2, an oil chamber 63 provided in a hollow portion of the handle, an oil chamber cap 64, and a mechanism 65-73 associated therewith are provided. Since this is a technology not directly related to the present invention, its description is omitted.

 Although the present invention has been described with reference to a plurality of embodiments, the present invention is not limited to these embodiments.

Claims

The scope of the claims 1. A cutter tip having a conical shaft formed on both sides of the edge of the cutting edge,  With two holder members,  It is provided on the opposite side of this holder member, and comprises a bearing for supporting the cutter tip,  A tip holder characterized in that the shape of the concave portion for supporting the cutter tip of the bearing is a bent shape. 2. The chip holder according to claim 1, wherein the convex shape is a curved surface having a predetermined radius of curvature.  3. The chip holder according to claim 1, wherein the concave portion does not penetrate the holder member.  4. The concave portion is non-penetrating through the holder member, and the radius of curvature is 0.1 D 瞧 to D hidden when the diameter of the edge of the cutter tip is Dmm. Holder for chips.  5. The chip holder according to claim 1, wherein the recess penetrates the holder member.  6. The concave portion penetrates the holder member, and the radius of curvature is Dran! 3. The chip holder according to claim 2, which has a thickness of 2 to 2 Dmm.  7. The chip holder according to claim 1, wherein a material of the bearing is a single crystal diamond.  8. The chip holder according to any one of claims 1 to 6, wherein the material of the bearing is sintered diamond.  9. A method for manufacturing a chip holder comprising a cutter chip having a conical shaft formed on both sides of a cutting edge ridge, Forming a bell-shaped concave portion in a bearing that supports the force-titter chip; and holding the bearing holding mi holding the bearing with a first holder member and a second holder. Attaching to the member,  Assembling a first holder member and a second holder member each including the force cutter chip and the bearing;  A method for producing a chip holder, comprising: 10. The method for manufacturing a tip holder according to claim ⁹ , wherein the material of the bearing is single crystal diamond.  11. The method for manufacturing a chip holder according to claim 10, wherein the predetermined bell-shaped concave portion is processed using a YAG laser.  12. The method for manufacturing a chip holder according to claim 9, wherein the material of the bearing is sintered diamond.  13. The method for manufacturing a chip holder according to claim 12, wherein the predetermined bell-shaped concave portion is released.  14. A scribing apparatus having a function of moving a scribe head in the X direction and the Z or Y direction relative to a table on which a brittle material substrate is placed, wherein the scribe head is claimed. Item 9. A scribing device comprising the tip holder according to any one of Items 1 to 8 above.  15. A manual cutter comprising a cylindrical handle and a tip holder fixed to one end of the handle,  A manual power cutter, wherein the tip holder comprises the tip holder according to any one of claims 1 to 8.